Eucalyptus comes from the eucalyptus tree, native to Australia, but is
now grown in many places all over the world. It's the oil, derived from
the crushed leaves of the tree, that has made its mark as nature's
medicine. Its antibacterial, anti-inflammatory and analgesic properties
have been used over the centuries for cosmetic and dental use, to ward
off insects, and to treat a wide range of respiratory problems.